稀土元素对精炼渣性能的影响  

Effects of Rare Earth Elements on Performances of Refining Slag

作　　者：张胤 张怀军[1,2] 刁望才 张顺 曹瑞峰 韩春鹏 Zhang Yin;Zhang Huai-jun;Diao Wang-cai;Zhang Shun;Cao Rui-feng;Han Chun-peng(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China;Inner Mongolia Key Laboratory of Rare Earth Steel Products Research&Development,Baotou 014010,Inner Mongolia Autonomous Region,China;Steel-making Plant of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010 [2]内蒙古自治区稀土钢产品研发企业重点实验室,内蒙古包头014010 [3]内蒙古包钢钢联股份有限公司炼钢厂,内蒙古包头014010

出　　处：《包钢科技》2024年第3期36-44,共9页Science & Technology of Baotou Steel

摘　　要：精炼渣对钢液洁净度有着非常重要的影响,其作用主要有提高脱氧元素的脱氧能力、吸收钢中的非金属夹杂物和防止钢液的二次氧化生成FeO、MnO和SiO_(2)。钢液精炼过程中,合理的精炼渣成分起到了吸附去除钢中夹杂物的作用。在稀土钢冶炼过程中,因稀土易与钢中氧、硫元素发生反应,并且由于精炼渣高氧、高硫势能的作用,稀土元素会进入精炼渣中,形成稀土氧化物、稀土硫化物。炼钢生产过程中因不同的脱氧制度,三元精炼渣CaO-SiO_(2)-Al_(2)O_(3)中各组分含量不同,稀土对精炼渣物理性能影响也会有所差异。文章通过测试的手段对稀土钢冶炼时稀土精炼渣熔点、黏度、碱度等物理性质进行了分析,以预测精炼渣的物理性质,对提高造渣水平及冶炼钢种洁净度、提高稀土收得率提供理论依据。The effects of refining slag on cleanliness of liquid steel are very important.Its main functions are improving the deoxidizing capacity of deoxidizing elements,absorbing nonmetallic inclusions in steel and preventing secondary oxidation of liquid steel to generate FeO,MnO and SiO_(2).In the process of refining liquid steel,the reasonable composition of refining slag plays a role of adsorbing and removing inclusions in steel.In the process of smelting rare earth steel,rare earth oxides and rare earth sulfides are formed due to rare earth is easy to react with oxygen and sulfur elements in steel as well as rare earth elements could enter refining slag because of the function of potential energy of high oxygen and sulfur for refining slag.In the production process of steelmaking,the contents of each component in ternary refining slag CaO-SiO_(2)-Al_(2)O_(3)are different and the effects of rare earth on physical properties of refining slag are different because of different deoxidation systems.In the paper,such physical properties of rare earth refining slag when smelting rare earth steel as melting point,viscosity and alkalinity are analyzed by means of testing to predict the physical properties of refining slag,which could provide theoretical basis for improving the level of slag formation,cleanliness of smelting steel grade and yield of rare earth.

关 键 词：稀土 精炼渣 收得率 

分 类 号：TF769.2[冶金工程—钢铁冶金]